Drawing board



C. E. BARKER DRAWING BOARD Filed June 21.. 1926 gwuwtoa[HARLESfDWA/VDBARKER awe mugs.

Patented Oct. 23, 1928;

onanrgns 11., nanxnaqor SAN rnancrsoo, .cnn roiima,

DRAWING BOARD.

Application fi1ed' Tune '21, 1926; Serial No.- 11 7,496,

Thisinvention relates todrawing boards, 7 'but it ism be understood thatmy invention releasable means for holding a sheet of paper to the board.

Another object of my invention 1s the provisionof means whereby a sheetof paper may be readily placed in its proper position relative to theedge of the board. 7 1

With the foregoing objects in view, to-

gether with such other objects and advan-' tages. as may subsequentlyappear, this invention resides inthe construction and arrangement ofparts hereinafter described and claimed, and illustrated inthe'accompanying drawings, in which? Figure 1 is aperspectiveviewshowing a.

drawing board and a sheet of drawing paper fixed thereto by theapparatus of my invention. s

Figure 2 is a bottom plan view of my improved drawing board shownin'Figure 1, and

Figure 3 is an irregular section taken on the broken line 3-8 ofFigure2;

Referring to the drawings for more detailed description thereof, thenumeral 5.indicates a drawing board provided with alined apertures 6,through which pass threaded bolts 7 of, smaller diameter than theapertures 6. The bolts 7 are provided with heads 8 adj acent the upperface of the board. WVash-' ers 9 encircle the bolts 7 and contact withthe lower face of the board 5. Washers 10 also encircle the bolts 7 andcontact with the washers 9. Members 12 also encircle the bolts 7 and areheld in spaced relation from the washers 1O by means .of coiled springs15.

Nuts 16 thread'edly engage .the bolts 7 and press the members 12 againstthe coiled springs 15. v v

It will be noted that the springs 15 and the nuts 16 constitute meansfor adjustably securing the members 12,to the bolts 7. ,The positions ofthe members 12 on the bolts 7 determine the leverage employed'fortilting the bolts. The members 12 are L-shaped in section as shown inFigure 3, and comprise portions 12 each having an aperture there-'through to receive the ends of coiled springs heads 8 and the board,means are provided nel shaped member 25.

17, the totherends o fwhich are secured to the board by means of staples18.

The coiledsprings 17 are under such tension that they pull the bolts 7in such a direction that one side of each of the bolts 7 press againstthe board. V

In order tolift the sides of the bolts 8 which press against the board,so that a sheet of paper 19 may be inserted between the whereby thepulling forces of the coils 17 may be counteracted, and such means areherein shown as comprising wires 21 secured at 22 to those points of themembers 12 which are opposite the points of the latter members to whichthe springs 17 are secured. The wires 21 may be integral, as shown in Figure 2, the loop being secured to a channel-shaped member 25. Thechannel-shaped member 25is provided with a transverse, elongated slot26, through Which passes into the board a screw 27, the

head of which contacts with a washer 28 which is adjacent the'bottom ofthechan- The channel-shaped member 25 is. transversely slidable relativeto the screw 27, and normally liesin such p0 sition that the wires 21are not under tension, so-that the coils 17 exert a pull on the bolts 7tohold thelatter in such positions that the heads 8 thereof securely,hold the sheet of paper18 on the board. v

When it is desired to release the pressure of the heads 8 from the.sheet of paper, the channel-shaped member 35 may be pulled towards theedge 30 of the board, whereupon a 'forceis applied in opposition to theten sionedcoil 17, and the bolts 7 are tilted so that the heads 8, whichpress'against the sheet of paper, are removed from the latter.

While I havedescribed one embodiment of my invention, modificationsthereof maybe readily devised without departing from the spirit of myinvention, and it is to be understood that such modifications comewithin the scope of the appended claims.

, I claim p p 1; A device of the type described comprising a bolt, aboard having a conical-shaped opening for receiving saidbolt, said bolthaving a head bearing against one surface of the board, spring means foryieldingly holding said head in contact with theboard, a pair of platesmounted on said bolt, one of said plates bearing against said board, anut for holding the second plate in position, said spring means being,disposed between said plates, a spring connecting the second plate withsaid board, a handle movably carried by said board, and 5 connectionsbetween said handle and said second plate.

2. A device of the type described compris- I ing a board having aconical-shaped opening therein, 1 being disposed at the top, of saidboard, a

ameter of said bore,

the smaller diameter of said opening member disposed in said opening ofsn'bstan tially the same diameter as the smaller disaid member having anenl rged head, the under surface of which is normally heldfiin contactwith said board, andmeans for moving said member for rocking said headinto an angle with respect to said board for receiving papertherebetween. 7

CHARLES BARKER.

